essentia.js in node.script ?

i would like to use essentia.js from within max.
searching the forum was resulting in this thread:
https://cycling74.com/forums/timeout-error-in-long-n4m-process
where in a code from Florian Demmer appears essentia.js
i tried a bit from there, but did not get very far,
except for listing the algorithm names as a proof for essentia.js is loaded.
can somebody please give me a hint where to go from here?
even maybe also sending audio from max?
i attach the basic patch..